As stated i have a 2004 WRX uppipe, Intercooler, and axelback exhaust. All with ~70K miles.
uppipe - $35 + shipping
(will gut uppipe for additional $25)
Intercooler - $40 + shipping
In pretty good shape for the mileage. I cleaned out and straightened any bent fins.
Axelback - $20 pickup only (unless you really want to pay for shipping on that dang heavy thing)